SK-3311 is an Arnott designed new rear shock for the right or left side of the 2002-2009 Mercedes-Benz E-Class (W211) and the 2004-2011 CLS-Class (W219) vehicles without ADS. This new shock, which fits both the left and right side, includes a custom valved and thoroughly road tested shock which provides an excellent ride. This twin tube shock includes a new polyurethane bump stop, new top and bottom mounts and a protective dust boot. The new replacement E-Class rear shock is assembled in the USA. This replacement Mercedes-Benz E-Class rear shock is assembled by Arnott in the USA.